Etanol - caro e perigoso

"... You may have read about the high energy inputs necessary to squeeze corn (and other materials) and brew the mash into alcohol; that it takes more energy to make the stuff than you end up with – and that the energy it takes to make it is (you guessed it) mostly petroleum.

And you’ve probably heard about the way increasing demand for alcohol-laced fuels (mandated by law, of course) has been driving up the cost of food as more and more land/crops formerly devoted to production of stuff to fill our gullets is being turned over to production of stuff to fill our tanks...
Also that ethanol is less energy dense than gasoline – so your gas mileage goes down while the price at the pump goes up. Most of the “gasoline” sold today is in fact 5-10 percent ethanol. This less less-energy-dense fuel is no doubt part of the reason why even the best of today’s “economy” cars like the 2011 Ford Fiesta still don’t get better gas mileage than the economy cars of 25 years ago...
But here’s a new one, one not much discussed in the papers: Alcohol fuels – especially E85, which is 85 percent alcohol – constitute a new type of fire hazard because they are harder to extinguish than gasoline fires and require new types of fire-extinguishing equipment and training..."
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